Author Topic: 2nd CP 5176 Failed at TP3 Troubleshooting

April 13, 2026, 12:30:02 PM
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RFR

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Hi community,

I'm having an issue with my 2nd CP 5173 (#2).
I don't get the voltages at TP2 & TP3 compared to my 1st unit (#1).

Anything from 1:2 to 1:20 doesen't come close measurements.
Also I see a bigger gap on TP1 when I increase Source Voltage. Did I install T1 wrong? I'm sure I checked this 2 times prio soldering.

I can exclude front PCB, as I have the same results when using the front #2 at main #1 pcm.

Any idea why my Voltages are tht so far off?
Measurements:


April 13, 2026, 07:57:28 PM
Reply #1

RFR

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Adding measuments from Trouble Shooting Guide

2.) 
V+: +15,9  VDC
V-: -15,93 VDC    
L1:  55    mVDC

No Signal
A: 12,8   VDC
B:  0,587 VDC
C: 13,41  VDC
D: -0,135 VDC
E: 15,14  VDC
F:  0,784 VDC
G: -15,16 VDC

3.) 
TP1: 538   mVAC
TP2:  7,26 VAC
L1:  10,9  VAC 1:2-1:20
     13,3  VAC @Slam

4.) 
TP3
1:2  = 0,178 VAC
1:4  = 0,353 VAC
1:8  = 0,570 VAC
1:12 = 0,950 VAC
1:20  = 1,62  VAC
Slam  = 7,18  VAC

TP4
1:2  =   0   VDC
1:4  =  -0,5 VDC
1:8  = -1,34 VDC
1:12 = -2,46 VDC
1:20 = -5,50 VDC
Slam = -0,64 VDC

JMP1 Pin 1

1:2  =  0,073 VDC
1:4  = -0,010 VDC
1:8  = -0,012 VDC
1:12 = -0,015 VDC
1:20 = -0,018 VDC
Slam =  8,860 VDC


TP6

-3,61 VDC

TP5
0,32 VDC


April 13, 2026, 11:59:37 PM
Reply #2

RFR

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Hi, topic is resolved.

After checking and checking and not finding any issues, I decided to go through the set-up procedure again.
I'm not sure what I did wrong on my first try but there is something in the setup-guide what leads to do interprate to do something wrong.

I believe it's the route cause is the P5 initial position during set-up at step 6.

Anyway, there was nothing wrong
TP3 and JMP1 values match now.




 

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